Number of ascent sequences of length n with exactly six flat steps.
A242159
Number of ascent sequences of length n with exactly six flat steps.
Terms
- a(0) =1a(1) =7a(2) =56a(3) =420a(4) =3360a(5) =28182a(6) =250404a(7) =2354352a(8) =23408385a(9) =245710465a(10) =2717803088a(11) =31615680096a(12) =386038045848
External references
- oeis: A242159